/*
 * Copyright 2017 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkSGGroup_DEFINED
#define SkSGGroup_DEFINED

#include "modules/sksg/include/SkSGRenderNode.h"

#include <vector>

namespace sksg {
/* *
 * Concrete node, grouping together multiple descendants.
 */
class Group : public RenderNode {
public:
    static sk_sp<Group> Make()
    {
        return sk_sp<Group>(new Group(std::vector<sk_sp<RenderNode>>()));
    }

    static sk_sp<Group> Make(std::vector<sk_sp<RenderNode>> children)
    {
        return sk_sp<Group>(new Group(std::move(children)));
    }

    void addChild(sk_sp<RenderNode>);
    void removeChild(const sk_sp<RenderNode> &);

    size_t size() const
    {
        return fChildren.size();
    }
    bool empty() const
    {
        return fChildren.empty();
    }
    void clear();

protected:
    Group();
    explicit Group(std::vector<sk_sp<RenderNode>>);
    ~Group() override;

    void onRender(SkCanvas *, const RenderContext *) const override;
    const RenderNode *onNodeAt(const SkPoint &) const override;

    SkRect onRevalidate(InvalidationController *, const SkMatrix &) override;

private:
    std::vector<sk_sp<RenderNode>> fChildren;
    bool fRequiresIsolation = true;

    using INHERITED = RenderNode;
};
} // namespace sksg

#endif // SkSGGroup_DEFINED
